Data Points to Rapid Loss of Control Aboard EgyptAir Jet, A section of baggage afloat in the Mediterranean Sea. Floating nearby, a commuter bench from a plane. Scraps of metal, broadcast claimed accouterments and, finally, the austere analysis of animal remains.
As the analysis connected Friday into what acquired an EgyptAir flight from Paris to Cairo to al of a abrupt and berserk attempt from the sky, the analysis of the bits accustomed seek crews to home in on the breadth of the bang — an breadth about 180 afar arctic of Alexandria, Egypt — even as its could could cause remained a abstruseness and the accountable of acute speculation.
Data that was transmitted from the aircraft to operators on the ground, appear Friday by a admired aerodynamics journal, appear a accelerated blow of control, with alarms and computer-system failures in the abnormal afore the even was absent from radar.
The transmissions are affirmation of a adverse failure, but do not acknowledgment the acute question: What acquired it? Why would a even with a acceptable assurance almanac and accomplished pilots abatement from the sky on a bright bounce night?
No aggregate blow has been found, and the locations of the aircraft a lot of acceptable to accommodate clues for lath — including the articulation and abstracts recorders — are aswell the ones a lot of acceptable to bound bore to the seafloor.
An Egyptian official has said that lath accede agitation to be one accessible could could cause of the disaster, but no agitator accumulation has claimed responsibility. Officials cautioned that there was no absolute affirmation to advance a bomb aboard the plane, or any added advised act of sabotage.
The plane, a twin-engine Airbus A320 jet, went down Thursday while aerial through a clement night sky en avenue to Cairo from Paris.
The Hellenic Civil Aerodynamics Authority provided what a agent alleged a absolute timeline on the disaster. The bureau appear that the flight was proceeding commonly at 1:48 a.m. Cairo time on Thursday, if Greek cartage controllers endure batten with the pilot, who seemed in acceptable spirits.
At 2:27 a.m., if the even was casual from Greek to Egyptian-supervised airspace, the controllers in Athens approved and bootless afresh to ability the pilots by radio. Even attempts on an emergency abundance failed.
At the aforementioned time, abstruse abstracts was getting transmitted from the even automatically through its Aircraft Communications Addressing and Reporting System, or Acars, which avant-garde jetliners use to accommodate cachet updates to aliment and operational centers on the ground.
Representatives of Airbus and the Federal Aerodynamics Administration said they could not affirm the actuality of the abstruse signals. Dina El-Fouly, a backer for EgyptAir, beneath to animadversion on the allegedly leaked data.
“We cannot say anything, because we accept already launched a lath to investigate the crash,” she said. “It hasn’t told us annihilation until now.”
The data, aboriginal appear on AVHerald.com, is accounting tersely in abbreviations and codes. Robert W. Mann, a above bartering airline pilot and an industry analyst, said the abracadabra in the letters told a compelling, although incomplete, story.
At 2:26 a.m., a bulletin adumbrated that the appropriate cockpit window had been opened. This could accept been done to aperture smoke, Mr. Mann said, or something abroad could accept acquired the breach.
Over the next two minutes, there were two smoke indications, one in a bath and addition in the avionics bay, the allotment of the even breadth abundant of its cyberbanking accessories is housed.
Mr. Mann cautioned that these letters did not necessarily beggarly that there was a fire. The letters could aswell accept been prompted by accelerated decompression of the aircraft, which can aftermath abstract that the plane’s sensors could aberration for smoke.
Finally at 2:29, there were two added alerts accepting to do with the plane’s flight ascendancy computer systems.
“The endure two are troubling,” Mr. Mann said. “You are starting to absolutely see things rapidly degrade.”
First, there was a botheration with the autoflight ascendancy computer. The jet would accept been aerial abreast its best acceleration and acclivity at that time. That is the a lot of able way for jetliners to fly, and it is safe, but pilots adopt to await on autopilot systems in those distance because if they were to anytime lose ascendancy of the plane, it could be harder to regain, Mr. Mann said. That is why pilots sometimes alarm those distance the “coffin corner.”
The endure bulletin had to do with the addle-brain elevator controller, which about controls the flaps amenable for angle and cycle control. The computer authoritative these bootless as well.
“It looks to me like you accept a accelerating flight ascendancy arrangement failure,” Mr. Mann said. It is over the advance of two minutes, which ability accept seemed like an aeon on that plane, but is about fast.
This is aswell the moment that the even larboard Greek airspace, and at 2:29:40 a.m., Greek controllers absent the aircraft’s trace, just central Egyptian airspace, about center amid Crete and Egypt.
Around this time, the even fabricated a 90-degree about-face to the larboard and afresh a abounding amphitheater to the right, bottomward precipitously to 15,000 anxiety from 37,000 and afresh coast afresh to 9,000 anxiety afore it abolished from radar.
The aggregation never gave any adumbration of a abstruse botheration or added difficulties on board, even during the final, baleful account if the even itself was transmitting abstracts advertence a adverse failure.
One above bang investigator said that alarm affirmation pointing to a alternation of aciculate assignment in the moments afore alarm acquaintance was absent appropriate that the even was about absolutely not beneath the ascendancy of the pilots.
Whatever agitated the Airbus was so abrupt and agitated that it could not be compensated for by the plane’s automatic assurance systems.
“In my mind, this basically opens two axes of possibility: either a abrupt abstruse botheration or some affectionate of adulterous or agitator act,” said the expert, Alain Bouillard, a above arch investigator for the French Bureau of Investigations and Analyses.
Given the bound bulk of affirmation accessible so far, experts said it was difficult to say with any authoritativeness what affectionate of abstruse abortion could accept brought the even down.
One possibility, Mr. Bouillard said, ability be a malfunction in the plane’s berth pressurization systems that could accept acquired the assembly to rupture. At top altitude, such a breach could be potentially adverse if the aggregation was clumsy to admit a controlled coast to a lower distance and accomplish an emergency landing.
If the analysis fails to bare able affirmation of a abstruse problem, experts said the achievability of a added adverse alternation of contest would a lot of acceptable yield prominence. But accustomed the affairs of this accident, decidedly in the absence of a affirmation of albatross by a agitator accumulation or intelligence pointing to a perpetrator, it could yield months to prove with any authoritativeness that it was a agitator act.
An antecedent analysis of the cartage aboard adjoin American agitator watch lists accept begin no matches, according to Representative Adam B. Schiff of California, the chief Democrat on the House Intelligence Committee, who has accustomed several briefings on the investigation.
The Islamic State, advised the a lot of acceptable accumulation abaft the attack, is commonly quick to advertise its role, as it did endure abatement afterwards the bang of a Russian flight over Egypt’s Sinai Desert.
“Its important to agenda that allegation in the amphitheater of agitation is crucial,” said Michael S. Smith II, a managing accomplice of Kronos Advisory, a close specializing in agitation research.
What may be a lot of admired to lath — and conceivably far added difficult to balance — is actual that would accept bound sunk to the seafloor.
If that bits is broadcast over a advanced area, and the pieces are about small, it would advance that the even bankrupt up in the air — acknowledging the approach of an onboard explosion. However, if the bits acreage is concentrated in a about baby area, that would announce that the aircraft hit the apparent of the baptize abundantly intact.
The plane’s two flight abstracts recorders, or “black boxes,” if they can be recovered, would aswell accommodate important clues.
The shock beachcomber of an onboard explosion, for example, may accept been captured by the microphones of the cockpit articulation recorder, experts said; such a bang would aswell instantly attenuate the flight abstracts recorder. In the accident of a abstruse failure, Mr. Bouillard said, the abstracts recorder — which advance advice including the plane’s position, speed, distance and administration — would commonly abide to action until the moment of impact.
Officials could aswell not aphorism out that one of the pilots carefully brought down the plane.
The flight clue of the Airbus on Thursday adumbrated that it comatose center amid Crete and Egypt, which could beggarly it landed on what scientists accredit to as the Mediterranean Ridge.
The backbone has been pushed advancement by the African bowl of the earth’s band sliding beneath the Aegean Sea, deforming and crumbling the seafloor, said William B.F. Ryan, a scientist at the Lamont-Doherty Earth Observatory at Columbia University who has advised the Mediterranean seafloor.
The baptize there is about 1.5 afar deep, and acrimonious out blow at the basal from a part of the bumps, which are conceivably 50 to 100 anxiety in size, could be complex, he said.
If the even comatose further to the south, the blow would lie on a smoother apparent at a abyss amid 1.7 and 2 miles, Dr. Ryan said. In that case, the seek would go faster — and the much-desired acknowledgment to what acquired the bang could appear quicker.
As the analysis connected Friday into what acquired an EgyptAir flight from Paris to Cairo to al of a abrupt and berserk attempt from the sky, the analysis of the bits accustomed seek crews to home in on the breadth of the bang — an breadth about 180 afar arctic of Alexandria, Egypt — even as its could could cause remained a abstruseness and the accountable of acute speculation.
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| Data Points to Rapid Loss of Control Aboard EgyptAir Jet |
The transmissions are affirmation of a adverse failure, but do not acknowledgment the acute question: What acquired it? Why would a even with a acceptable assurance almanac and accomplished pilots abatement from the sky on a bright bounce night?
No aggregate blow has been found, and the locations of the aircraft a lot of acceptable to accommodate clues for lath — including the articulation and abstracts recorders — are aswell the ones a lot of acceptable to bound bore to the seafloor.
An Egyptian official has said that lath accede agitation to be one accessible could could cause of the disaster, but no agitator accumulation has claimed responsibility. Officials cautioned that there was no absolute affirmation to advance a bomb aboard the plane, or any added advised act of sabotage.
The plane, a twin-engine Airbus A320 jet, went down Thursday while aerial through a clement night sky en avenue to Cairo from Paris.
The Hellenic Civil Aerodynamics Authority provided what a agent alleged a absolute timeline on the disaster. The bureau appear that the flight was proceeding commonly at 1:48 a.m. Cairo time on Thursday, if Greek cartage controllers endure batten with the pilot, who seemed in acceptable spirits.
At 2:27 a.m., if the even was casual from Greek to Egyptian-supervised airspace, the controllers in Athens approved and bootless afresh to ability the pilots by radio. Even attempts on an emergency abundance failed.
At the aforementioned time, abstruse abstracts was getting transmitted from the even automatically through its Aircraft Communications Addressing and Reporting System, or Acars, which avant-garde jetliners use to accommodate cachet updates to aliment and operational centers on the ground.
Representatives of Airbus and the Federal Aerodynamics Administration said they could not affirm the actuality of the abstruse signals. Dina El-Fouly, a backer for EgyptAir, beneath to animadversion on the allegedly leaked data.
“We cannot say anything, because we accept already launched a lath to investigate the crash,” she said. “It hasn’t told us annihilation until now.”
The data, aboriginal appear on AVHerald.com, is accounting tersely in abbreviations and codes. Robert W. Mann, a above bartering airline pilot and an industry analyst, said the abracadabra in the letters told a compelling, although incomplete, story.
At 2:26 a.m., a bulletin adumbrated that the appropriate cockpit window had been opened. This could accept been done to aperture smoke, Mr. Mann said, or something abroad could accept acquired the breach.
Over the next two minutes, there were two smoke indications, one in a bath and addition in the avionics bay, the allotment of the even breadth abundant of its cyberbanking accessories is housed.
Mr. Mann cautioned that these letters did not necessarily beggarly that there was a fire. The letters could aswell accept been prompted by accelerated decompression of the aircraft, which can aftermath abstract that the plane’s sensors could aberration for smoke.
Finally at 2:29, there were two added alerts accepting to do with the plane’s flight ascendancy computer systems.
“The endure two are troubling,” Mr. Mann said. “You are starting to absolutely see things rapidly degrade.”
First, there was a botheration with the autoflight ascendancy computer. The jet would accept been aerial abreast its best acceleration and acclivity at that time. That is the a lot of able way for jetliners to fly, and it is safe, but pilots adopt to await on autopilot systems in those distance because if they were to anytime lose ascendancy of the plane, it could be harder to regain, Mr. Mann said. That is why pilots sometimes alarm those distance the “coffin corner.”
The endure bulletin had to do with the addle-brain elevator controller, which about controls the flaps amenable for angle and cycle control. The computer authoritative these bootless as well.
“It looks to me like you accept a accelerating flight ascendancy arrangement failure,” Mr. Mann said. It is over the advance of two minutes, which ability accept seemed like an aeon on that plane, but is about fast.
This is aswell the moment that the even larboard Greek airspace, and at 2:29:40 a.m., Greek controllers absent the aircraft’s trace, just central Egyptian airspace, about center amid Crete and Egypt.
Around this time, the even fabricated a 90-degree about-face to the larboard and afresh a abounding amphitheater to the right, bottomward precipitously to 15,000 anxiety from 37,000 and afresh coast afresh to 9,000 anxiety afore it abolished from radar.
The aggregation never gave any adumbration of a abstruse botheration or added difficulties on board, even during the final, baleful account if the even itself was transmitting abstracts advertence a adverse failure.
One above bang investigator said that alarm affirmation pointing to a alternation of aciculate assignment in the moments afore alarm acquaintance was absent appropriate that the even was about absolutely not beneath the ascendancy of the pilots.
Whatever agitated the Airbus was so abrupt and agitated that it could not be compensated for by the plane’s automatic assurance systems.
“In my mind, this basically opens two axes of possibility: either a abrupt abstruse botheration or some affectionate of adulterous or agitator act,” said the expert, Alain Bouillard, a above arch investigator for the French Bureau of Investigations and Analyses.
Given the bound bulk of affirmation accessible so far, experts said it was difficult to say with any authoritativeness what affectionate of abstruse abortion could accept brought the even down.
One possibility, Mr. Bouillard said, ability be a malfunction in the plane’s berth pressurization systems that could accept acquired the assembly to rupture. At top altitude, such a breach could be potentially adverse if the aggregation was clumsy to admit a controlled coast to a lower distance and accomplish an emergency landing.
If the analysis fails to bare able affirmation of a abstruse problem, experts said the achievability of a added adverse alternation of contest would a lot of acceptable yield prominence. But accustomed the affairs of this accident, decidedly in the absence of a affirmation of albatross by a agitator accumulation or intelligence pointing to a perpetrator, it could yield months to prove with any authoritativeness that it was a agitator act.
An antecedent analysis of the cartage aboard adjoin American agitator watch lists accept begin no matches, according to Representative Adam B. Schiff of California, the chief Democrat on the House Intelligence Committee, who has accustomed several briefings on the investigation.
The Islamic State, advised the a lot of acceptable accumulation abaft the attack, is commonly quick to advertise its role, as it did endure abatement afterwards the bang of a Russian flight over Egypt’s Sinai Desert.
“Its important to agenda that allegation in the amphitheater of agitation is crucial,” said Michael S. Smith II, a managing accomplice of Kronos Advisory, a close specializing in agitation research.
What may be a lot of admired to lath — and conceivably far added difficult to balance — is actual that would accept bound sunk to the seafloor.
If that bits is broadcast over a advanced area, and the pieces are about small, it would advance that the even bankrupt up in the air — acknowledging the approach of an onboard explosion. However, if the bits acreage is concentrated in a about baby area, that would announce that the aircraft hit the apparent of the baptize abundantly intact.
The plane’s two flight abstracts recorders, or “black boxes,” if they can be recovered, would aswell accommodate important clues.
The shock beachcomber of an onboard explosion, for example, may accept been captured by the microphones of the cockpit articulation recorder, experts said; such a bang would aswell instantly attenuate the flight abstracts recorder. In the accident of a abstruse failure, Mr. Bouillard said, the abstracts recorder — which advance advice including the plane’s position, speed, distance and administration — would commonly abide to action until the moment of impact.
Officials could aswell not aphorism out that one of the pilots carefully brought down the plane.
The flight clue of the Airbus on Thursday adumbrated that it comatose center amid Crete and Egypt, which could beggarly it landed on what scientists accredit to as the Mediterranean Ridge.
The backbone has been pushed advancement by the African bowl of the earth’s band sliding beneath the Aegean Sea, deforming and crumbling the seafloor, said William B.F. Ryan, a scientist at the Lamont-Doherty Earth Observatory at Columbia University who has advised the Mediterranean seafloor.
The baptize there is about 1.5 afar deep, and acrimonious out blow at the basal from a part of the bumps, which are conceivably 50 to 100 anxiety in size, could be complex, he said.
If the even comatose further to the south, the blow would lie on a smoother apparent at a abyss amid 1.7 and 2 miles, Dr. Ryan said. In that case, the seek would go faster — and the much-desired acknowledgment to what acquired the bang could appear quicker.
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